Pietro Fiorentini Zero Governor F3Z Regulator

Pietro Fiorentini’s ZERO Governor F3Z is a self-acting, air/gas ratio pressure regulator designed for high-precision control in combustion applications. Built to comply with ANSI Z21.8 standards, the F3Z is ideal for use in burner systems, mixing tees, proportional pre-mixers, and nozzle mixers. With a balanced valve and double-diaphragm design, this regulator ensures consistent air/gas ratios—even with fluctuating inlet pressures—while providing a secure backup in case of diaphragm failure.

Key Benefits

  • Maintains constant air/gas ratio across flow conditions

  • Accurate outlet pressure control regardless of inlet pressure variations

  • Double diaphragm for enhanced safety and failure protection

  • Complies with ANSI Z21.8 and CSA 6.22 standards

  • Suitable for natural gas, LPG, and non-corrosive gases

 

Features

  • Balanced valve design for high outlet pressure accuracy

  • Air/gas ratio control of 1:1

  • Nozzle, burner, and mixer compatible

  • Optional integrated filter

  • Durable construction with corrosion-resistant materials

 

Benefits

  • Increases safety and combustion efficiency in burner systems

  • Reduces risk of system failure due to diaphragm redundancy

  • Adapts to changing airflows in real-time for better flame stability

  • Minimizes emissions and optimizes fuel consumption

  • Easy maintenance via top-entry design

 

Capability

  • Inlet pressure: up to 7.25 PSIG

  • Outlet pressure: 0.2 – 60.2" W.C.

  • Compatible with control air pressure: 0.2 – 60.2" W.C.

  • Sizes: 1/2" to 4" NPT or ANSI 150RF

  • Minimum ΔP (Pu – Pd): 8" W.C.

  • Ambient operating range: 14°F – 140°F

 

Construction

  • Double-diaphragm fail-safe design

  • Optional integrated stainless steel filter

  • Air connection: 1/4" NPT

  • Heavy-duty housing with optional ANSI flange connections

  • Integral bypass drilling option for added control